Average Cost

A Greenstone Soapstone Masonry Heater will range in price from $6,000 to over $30,000 depending on size and design.  Shipping and installation at your location is additional and will vary.   Soapstone itself is the major cost driver in our masonry heaters with modern science and decades of real world experience proving soapstone to be a vastly superior masonry heater construction material.

All of our masonry heaters feature soapstone shell and core assemblies with a replaceable refractory inner firebox liner.

Generally speaking, the most important variables in a masonry heater are maximizing thermal mass and radiant surface area and utilizing materials that combine optimum rates of conductivity and thermal capture capacity.  Soapstone is generally recognized to be the best material in the world for both of these.

PHYSICAL PROPERTIES OF SOAPSTONE-  Assume 33% Magnesia (MgO) and 67% Silicon Dioxide (SiO2)
Specific heat capacity (heat sink): 785 J/Kg.°K
Thermal conductivity: 12.5 W/m.°K
Bulk Density:  2.95 g/cm3

PHYSICAL PROPERTIES OF FIREBRICK-  Assume 33% Aluminum Oxide (Al2O3) and 63% Silicon Dioxide SiO2
Specific heat capacity (heat sink): 756 J/Kg.°K
Thermal conductivity: 9.1 W/m.°K
Bulk Density:  2.0 g/cm3